BlackRock Muniyield Quality Fund III, Inc.

MYI

Exchange: NYSE
SEC CIK: 0000883412

SEC filings (opens in a new tab)

No open-market purchases or sales by BlackRock Muniyield Quality Fund III, Inc. insiders were filed in the last 90 days; 156 institutions reported holding it in 13F filings for Q2 2026, worth $431.8M in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding BlackRock Muniyield Quality Fund III, Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of MYI: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	109	2	152	+45
Shares	19.3M	8.88K	40.8M	+21.6M (+112.0%)
Value	$209.3M	$96.5K	$429.7M	+$220.5M (+105.4%)

2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (67)

Institutions that held BlackRock Muniyield Quality Fund III, Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to MYI in Q1 2026
Institution	Shares	Value	% of portfolio
Mackay Shields LLC	526,256	$5.53M	0.20%
Leo Wealth, LLC	274,876	$2.89M	0.21%
1607 Capital Partners, LLC	209,508	$2.20M	0.16%
Professional Financial Management, Inc.	148,721	$1.56M	1.63%
Dakota Wealth Management	144,652	$1.52M	0.03%
Toronto Dominion Bank	124,532	$1.31M	0.00%
Bank of New York Mellon Corp	97,146	$1.02M	0.00%
Indiana Trust & Investment Management CO	91,249	$959.0K	0.30%
Riverbridge Partners LLC	73,672	$774.3K	0.02%
Chicago Partners Investment Group LLC	68,016	$746.1K	0.02%
Lido Advisors, LLC	66,879	$706.6K	0.00%
Atala Financial Inc	54,739	$609.8K	0.41%
Wellspring Financial Advisors, LLC	56,563	$594.5K	0.04%
Callahan Advisors, LLC	55,692	$585.3K	0.05%
Noble Wealth Management PBC	53,672	$564.1K	0.29%
Oppenheimer & Co Inc	51,604	$542.4K	0.01%
Cambridge Investment Research Advisors, Inc.	43,557	$458.0K	0.00%
Kapstone Financial Advisors LLC	38,625	$405.9K	0.20%
Integrated Wealth Concepts LLC	37,434	$393.4K	0.00%
Stratos Wealth Partners, LTD.	36,806	$386.8K	0.00%
Nuveen, LLC	36,296	$381.5K	0.00%
Virtue Asset Management LLC	35,606	$374.2K	0.30%
U.S. Capital Wealth Advisors, LLC	31,609	$332.2K	0.01%
Closed-End Fund Advisors, Inc.	30,881	$324.6K	0.33%
Benjamin Edwards Inc	29,161	$306.5K	0.00%
Yakira Capital Management, Inc.	28,662	$301.2K	0.09%
Eastern Bank	28,320	$297.6K	0.01%
Verdence Capital Advisors LLC	26,965	$283.4K	0.02%
River Street Advisors LLC	26,766	$281.3K	0.10%
Northern Trust Corp	26,494	$278.5K	0.00%
Davis Investment Partners, LLC	25,839	$271.6K	0.10%
Central Trust Co	19,000	$199.7K	0.00%
Truist Financial Corp	18,980	$199.5K	0.00%
Fortitude Advisory Group L.L.C.	18,010	$189.3K	0.09%
M&T Bank Corp	16,994	$178.3K	0.00%
RSM US Wealth Management LLC	16,011	$168.9K	0.00%
Nomura Holdings Inc	16,000	$168.2K	0.00%
Savvy Advisors, Inc.	15,417	$162.0K	0.00%
Aviance Capital Partners, LLC	14,347	$150.8K	0.02%
Coastal Investment Advisors, Inc.	13,275	$139.5K	0.05%
Merit Financial Group, LLC	11,939	$125.5K	0.00%
Chapin Davis, Inc.	10,500	$110.4K	0.02%
NWF Advisory Services Inc.	10,115	$106.3K	0.01%
Citizens National Bank Trust Department	9,830	$103.3K	0.02%
Fifth Third Bancorp	8,200	$86.2K	0.00%
Bokf, NA	6,204	$65.2K	0.00%
Blue Bell Private Wealth Management, LLC	5,224	$54.9K	0.01%
CWM, LLC	4,220	$44.4K	0.00%
EverSource Wealth Advisors, LLC	4,173	$43.9K	0.00%
Geneos Wealth Management Inc.	4,042	$42.5K	0.00%
Larson Financial Group LLC	3,160	$33.2K	0.00%
Ameritas Advisory Services, LLC	3,160	$33.2K	0.00%
Allworth Financial LP	2,008	$21.1K	0.00%
Bartlett & Co. Wealth Management LLC	1,931	$20.7K	0.00%
Private Trust Co NA	1,963	$20.6K	0.00%
PlanVest Financial, Inc	1,896	$19.9K	0.02%
Mascoma Wealth Management LLC	1,218	$12.8K	0.00%
GHP Investment Advisors, Inc.	1,178	$12.4K	0.00%
Penserra Capital Management LLC	992	$10.0K	0.00%
Farther Finance Advisors, LLC	747	$7.93K	0.00%
BlackRock, Inc.	715	$7.51K	0.00%
Brown, Lisle/Cummings, Inc.	655	$6.88K	0.00%
Abound Wealth Management	572	$6.01K	0.00%
Delta Asset Management LLC	296	$3.11K	0.00%
Smartleaf Asset Management LLC	244	$2.54K	0.00%
Mather Group, LLC.	212	$2.23K	0.00%
St Germain D J Co Inc	79	$830	0.00%

Sold out (22)

Institutions that held BlackRock Muniyield Quality Fund III, Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of MYI in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Hennion & Walsh Asset Management, Inc.	1,554,195	$16.9M
Logan Stone Capital, LLC	43,600	$473.9K
Landscape Capital Management, L.L.C.	39,527	$429.7K
First Western Trust Bank	39,221	$426.3K
HRT Financial LP	33,680	$366.0K
Readystate Asset Management LP	32,790	$356.4K
Crescent Grove Advisors, LLC	31,350	$340.8K
Janney Montgomery Scott LLC	28,420	$309.0K
XTX Topco Ltd	28,308	$307.7K
Cresta Advisors, Ltd.	27,000	$293.5K
Pathway Financial Advisers, LLC	20,870	$226.9K
Plancorp, LLC	20,000	$217.4K
TrueMark Investments, LLC	17,943	$195.0K
Susquehanna International Group, LLP	13,662	$148.5K
Cerity Partners LLC	13,339	$145.0K
Permanent Capital Management, LP	12,842	$139.6K
Moody National Bank Trust Division	10,420	$113.3K
Two Sigma Securities, LLC	10,171	$110.6K
Colony Group, LLC	10,000	$108.7K
Elyxium Wealth, LLC	6,316	$68.7K
Wolverine Asset Management LLC	2,884	$31.3K
Prestige Wealth Management Group LLC	2,488	$27.0K

Not filed for Q1 2026 yet (2)

Institutions that held BlackRock Muniyield Quality Fund III, Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding MYI in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Comerica Bank	6,579	$71.5K
Trust Co of Vermont	2,300	$25.0K